```html
<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>NoteGPT - AI 智能摘要与生成工具</title>
    <link href="https://cdn.staticfile.org/font-awesome/6.4.0/css/all.min.css" rel="stylesheet">
    <link href="https://cdn.staticfile.org/tailwindcss/2.2.19/tailwind.min.css" rel="stylesheet">
    <link href="https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@400;500;600;700&family=Noto+Sans+SC:wght@300;400;500;700&display=swap" rel="stylesheet">
    <style>
        body {
            font-family: 'Noto Sans SC', Tahoma, Arial, Roboto, "Droid Sans", "Helvetica Neue", "Droid Sans Fallback", "Hiragino Sans GB", Simsun, sans-serif;
            color: #3f3f46;
        }
        h1, h2, h3, h4 {
            font-family: 'Noto Serif SC', serif;
        }
        .hero-gradient {
            background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 50%, #a855f7 100%);
        }
        .feature-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
        }
        .tooltip:hover .tooltip-text {
            opacity: 1;
            visibility: visible;
        }
    </style>
</head>
<body class="bg-gray-50">
    <!-- Hero Section -->
    <section class="hero-gradient text-white py-20 md:py-32 px-4 sm:px-6 lg:px-8">
        <div class="max-w-6xl mx-auto text-center">
            <div class="inline-block mb-6 px-4 py-2 bg-white bg-opacity-20 rounded-full backdrop-filter backdrop-blur-sm">
                <span class="text-sm font-medium">AI 智能工具</span>
            </div>
            <h1 class="text-4xl md:text-6xl font-bold mb-6 leading-tight">重新定义你的学习与工作效率</h1>
            <p class="text-xl md:text-2xl max-w-3xl mx-auto mb-10 opacity-90">NoteGPT 通过 AI 技术提供智能摘要与生成服务，让信息处理效率提升 10 倍</p>
            <div class="flex flex-col sm:flex-row justify-center gap-4">
                <a href="https://notegpt.io/cn" class="px-8 py-4 bg-white text-indigo-600 font-semibold rounded-lg hover:bg-opacity-90 transition-all duration-300 shadow-lg">
                    <i class="fas fa-rocket mr-2"></i> 立即体验
                </a>
                <a href="#features" class="px-8 py-4 border-2 border-white text-white font-semibold rounded-lg hover:bg-white hover:bg-opacity-10 transition-all duration-300">
                    <i class="fas fa-search mr-2"></i> 探索功能
                </a>
            </div>
        </div>
    </section>

    <!-- Introduction Section -->
    <section class="py-16 px-4 sm:px-6 lg:px-8 bg-white">
        <div class="max-w-6xl mx-auto">
            <div class="flex flex-col md:flex-row items-center gap-12">
                <div class="md:w-1/2">
                    <h2 class="text-3xl font-bold mb-6">NoteGPT 是什么？</h2>
                    <p class="text-lg mb-6 leading-relaxed">NoteGPT 是一个集成多种 AI 技术的平台，提供 YouTube 视频摘要、PDF 摘要、PPT 总结、图片总结等多种摘出服务，通过 AI 生成 PPT、思维导图和智能笔记，旨在提升用户的学习和工作效率。</p>
                    <div class="flex items-center text-indigo-600 font-medium">
                        <span>了解更多</span>
                        <i class="fas fa-arrow-right ml-2"></i>
                    </div>
                </div>
                <div class="md:w-1/2 relative">
                    <div class="relative rounded-xl overflow-hidden shadow-2xl">
                        <img src="https://images.unsplash.com/photo-1551288049-bebda4e38f71?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=2070&q=80" alt="AI 工作流程" class="w-full h-auto">
                        <div class="absolute inset-0 bg-gradient-to-t from-indigo-900 to-transparent opacity-50"></div>
                    </div>
                </div>
            </div>
        </div>
    </section>

    <!-- Features Section -->
    <section id="features" class="py-16 px-4 sm:px-6 lg:px-8 bg-gray-50">
        <div class="max-w-6xl mx-auto">
            <div class="text-center mb-16">
                <h2 class="text-3xl font-bold mb-4">强大功能</h2>
                <p class="text-lg text-gray-600 max-w-2xl mx-auto">NoteGPT 提供全方位的 AI 辅助工具，满足您各种学习与工作场景的需求</p>
            </div>
            
            <div class="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-8">
                <!-- Feature 1 -->
                <div class="feature-card bg-white rounded-xl p-8 shadow-md transition-all duration-300 hover:border-indigo-500 border border-transparent">
                    <div class="w-14 h-14 bg-indigo-100 rounded-lg flex items-center justify-center mb-6">
                        <i class="fas fa-video text-indigo-600 text-2xl"></i>
                    </div>
                    <h3 class="text-xl font-bold mb-3">视频摘要</h3>
                    <p class="text-gray-600">智能分析 YouTube 视频内容，生成简洁明了的摘要，节省观看时间。</p>
                </div>
                
                <!-- Feature 2 -->
                <div class="feature-card bg-white rounded-xl p-8 shadow-md transition-all duration-300 hover:border-indigo-500 border border-transparent">
                    <div class="w-14 h-14 bg-indigo-100 rounded-lg flex items-center justify-center mb-6">
                        <i class="fas fa-file-pdf text-indigo-600 text-2xl"></i>
                    </div>
                    <h3 class="text-xl font-bold mb-3">PDF/PPT 摘要</h3>
                    <p class="text-gray-600">快速提取文档关键信息，生成结构化摘要，提高阅读效率。</p>
                </div>
                
                <!-- Feature 3 -->
                <div class="feature-card bg-white rounded-xl p-8 shadow-md transition-all duration-300 hover:border-indigo-500 border border-transparent">
                    <div class="w-14 h-14 bg-indigo-100 rounded-lg flex items-center justify-center mb-6">
                        <i class="fas fa-project-diagram text-indigo-600 text-2xl"></i>
                    </div>
                    <h3 class="text-xl font-bold mb-3">思维导图</h3>
                    <p class="text-gray-600">将复杂内容转化为可视化思维导图，帮助理解和记忆。</p>
                </div>
                
                <!-- Feature 4 -->
                <div class="feature-card bg-white rounded-xl p-8 shadow-md transition-all duration-300 hover:border-indigo-500 border border-transparent">
                    <div class="w-14 h-14 bg-indigo-100 rounded-lg flex items-center justify-center mb-6">
                        <i class="fas fa-robot text-indigo-600 text-2xl"></i>
                    </div>
                    <h3 class="text-xl font-bold mb-3">AI 聊天助手</h3>
                    <p class="text-gray-600">与 AI 助手对话，深入理解视频、文件和网页等内容。</p>
                </div>
                
                <!-- Feature 5 -->
                <div class="feature-card bg-white rounded-xl p-8 shadow-md transition-all duration-300 hover:border-indigo-500 border border-transparent">
                    <div class="w-14 h-14 bg-indigo-100 rounded-lg flex items-center justify-center mb-6">
                        <i class="fas fa-keyboard text-indigo-600 text-2xl"></i>
                    </div>
                    <h3 class="text-xl font-bold mb-3">智能转文字</h3>
                    <p class="text-gray-600">提取全部内容，包括时间戳转录文本，方便快速浏览关键信息。</p>
                </div>
                
                <!-- Feature 6 -->
                <div class="feature-card bg-white rounded-xl p-8 shadow-md transition-all duration-300 hover:border-indigo-500 border border-transparent">
                    <div class="w-14 h-14 bg-indigo-100 rounded-lg flex items-center justify-center mb-6">
                        <i class="fas fa-book text-indigo-600 text-2xl"></i>
                    </div>
                    <h3 class="text-xl font-bold mb-3">智能笔记管理</h3>
                    <p class="text-gray-600">通过筛选、搜索、文件夹和标签等方式智能管理个人笔记库。</p>
                </div>
            </div>
        </div>
    </section>

    <!-- How It Works -->
    <section class="py-16 px-4 sm:px-6 lg:px-8 bg-white">
        <div class="max-w-6xl mx-auto">
            <h2 class="text-3xl font-bold mb-16 text-center">工作流程</h2>
            
            <div class="relative">
                <!-- Timeline line -->
                <div class="hidden lg:block absolute left-1/2 h-full w-1 bg-indigo-100 transform -translate-x-1/2"></div>
                
                <!-- Step 1 -->
                <div class="flex flex-col lg:flex-row items-center mb-16">
                    <div class="lg:w-1/2 lg:pr-16 mb-8 lg:mb-0">
                        <div class="bg-indigo-100 text-indigo-800 w-12 h-12 rounded-full flex items-center justify-center font-bold mb-4 mx-auto lg:mx-0">1</div>
                        <h3 class="text-xl font-bold mb-3 text-center lg:text-left">选择内容源</h3>
                        <p class="text-gray-600 text-center lg:text-left">上传 PDF/PPT 文档，或输入 YouTube 视频链接，让 AI 开始分析内容。</p>
                    </div>
                    <div class="lg:w-1/2 lg:pl-16">
                        <div class="bg-gray-100 rounded-xl p-4 shadow-inner">
                            <div class="flex items-center bg-white p-3 rounded-lg shadow-sm">
                                <i class="fas fa-link text-indigo-600 mr-3"></i>
                                <span class="text-sm">https://youtu.be/example-video</span>
                            </div>
                        </div>
                    </div>
                </div>
                
                <!-- Step 2 -->
                <div class="flex flex-col lg:flex-row items-center mb-16">
                    <div class="lg:w-1/2 lg:pr-16 order-last mb-8 lg:mb-0">
                        <div class="bg-indigo-100 text-indigo-800 w-12 h-12 rounded-full flex items-center justify-center font-bold mb-4 mx-auto lg:mx-0">2</div>
                        <h3 class="text-xl font-bold mb-3 text-center lg:text-left">AI 智能处理</h3>
                        <p class="text-gray-600 text-center lg:text-left">NoteGPT 使用先进的 AI 技术分析内容，提取关键信息并生成结构化摘要。</p>
                    </div>
                    <div class="lg:w-1/2 lg:pl-16 order-first">
                        <div class="bg-gray-100 rounded-xl p-4 shadow-inner">
                            <div class="bg-white p-4 rounded-lg shadow-sm text-center">
                                <i class="fas fa-cog fa-spin text-indigo-600 text-2xl mb-2"></i>
                                <p class="text-sm font-medium">AI 正在处理您的内容...</p>
                            </div>
                        </div>
                    </div>
                </div>
                
                <!-- Step 3 -->
                <div class="flex flex-col lg:flex-row items-center">
                    <div class="lg:w-1/2 lg:pr-16 mb-8 lg:mb-0">
                        <div class="bg-indigo-100 text-indigo-800 w-12 h-12 rounded-full flex items-center justify-center font-bold mb-4 mx-auto lg:mx-0">3</div>
                        <h3 class="text-xl font-bold mb-3 text-center lg:text-left">获取结果</h3>
                        <p class="text-gray-600 text-center lg:text-left">获取摘要、思维导图或笔记，并可进一步编辑、分享或保存到个人库中。</p>
                    </div>
                    <div class="lg:w-1/2 lg:pl-16">
                        <div class="bg-gray-100 rounded-xl p-4 shadow-inner">
                            <div class="bg-white p-4 rounded-lg shadow-sm">
                                <div class="flex justify-between items-center mb-3">
                                    <h4 class="font-bold">视频摘要</h4>
                                    <div class="flex space-x-2">
                                        <button class="text-indigo-600 hover:text-indigo-800"><i class="fas fa-share-alt"></i></button>
                                        <button class="text-indigo-600 hover:text-indigo-800"><i class="fas fa-download"></i></button>
                                    </div>
                                </div>
                                <p class="text-sm">1. 介绍部分: 讲解了...<br>2. 主要观点: ...<br>3. 结论: ...</p>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
        </div>
    </section>

    <!-- Testimonials -->
    <section class="py-16 px-4 sm:px-6 lg:px-8 bg-indigo-50">
        <div class="max-w-6xl mx-auto">
            <h2 class="text-3xl font-bold mb-16 text-center">用户评价</h2>
            
            <div class="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-8">
                <!-- Testimonial 1 -->
                <div class="bg-white rounded-xl p-8 shadow-md">
                    <div class="flex items-center mb-4">
                        <div class="w-12 h-12 rounded-full bg-indigo-100 flex items-center justify-center text-indigo-600 font-bold mr-4">S</div>
                        <div>
                            <h4 class="font-bold">Sarah L.</h4>
                            <div class="flex text-yellow-400">
                                <i class="fas fa-star"></i>
                                <i class="fas fa-star"></i>
                                <i class="fas fa-star"></i>
                                <i class="fas fa-star"></i>
                                <i class="fas fa-star"></i>
                            </div>
                        </div>
                    </div>
                    <p class="text-gray-600">"NoteGPT 彻底改变了我的学习方式。以前需要花几个小时观看的视频，现在只需几分钟就能掌握核心内容。"</p>
                </div>
                
                <!-- Testimonial 2 -->
                <div class="bg-white rounded-xl p-8 shadow-md">
                    <div class="flex items-center mb-4">
                        <div class="w-12 h-12 rounded-full bg-indigo-100 flex items-center justify-center text-indigo-600 font-bold mr-4">J</div>
                        <div>
                            <h4 class="font-bold">James W.</h4>
                            <div class="flex text-yellow-400">
                                <i class="fas fa-star"></i>
                                <i class="fas fa-star"></i>
                                <i class="fas fa-star"></i>
                                <i class="fas fa-star"></i>
                                <i class="fas fa-star"></i>
                            </div>
                        </div>
                    </div>
                    <p class="text-gray-600">"作为一名研究员，我需要阅读大量论文。NoteGPT 的 PDF 摘要功能帮我节省了大量时间，效率提高至少 5 倍。"</p>
                </div>
                
                <!-- Testimonial 3 -->
                <div class="bg-white rounded-xl p-8 shadow-md">
                    <div class="flex items-center mb-4">
                        <div class="w-12 h-12 rounded-full bg-indigo-100 flex items-center justify-center text-indigo-600 font-bold mr-4">M</div>
                        <div>
                            <h4 class="font-bold">Ming Z.</h4>
                            <div class="flex text-yellow-400">
                                <i class="fas fa-star"></i>
                                <i class="fas fa-star"></i>
                                <i class="fas fa-star"></i>
                                <i class="fas fa-star"></i>
                                <i class="fas fa-star-half-alt"></i>
                            </div>
                        </div>
                    </div>
                    <p class="text-gray-600">"AI 生成的思维导图功能让我的会议记录变得井井有条，团队成员都能快速理解会议要点，协作效率大幅提升。"</p>
                </div>
            </div>
        </div>
    </section>

    <!-- CTA Section -->
    <section class="py-20 px-4 sm:px-6 lg:px-8 bg-indigo-600 text-white">
        <div class="max-w-4xl mx-auto text-center">
            <h2 class="text-3xl md:text-4xl font-bold mb-6">准备好提升您的工作效率了吗？</h2>
            <p class="text-xl mb-10 opacity-90">立即免费体验 NoteGPT，开启智能学习与工作新时代</p>
            <div class="flex flex-col sm:flex-row justify-center gap-4">
                <a href="https://notegpt.io/cn" class="px-8 py-4 bg-white text-indigo-600 font-semibold rounded-lg hover:bg-opacity-90 transition-all duration-300 shadow-lg">
                    <i class="fas fa-play mr-2"></i> 立即开始
                </a>
                <a href="#" class="px-8 py-4 border-2 border-white text-white font-semibold rounded-lg hover:bg-white hover:bg-opacity-10 transition-all duration-300">
                    <i class="fas fa-question-circle mr-2"></i> 了解详情
                </a>
            </div>
        </div>
    </section>

    <!-- Footer -->
    <footer class="bg-gray-900 text-gray-300 py-12 px-4 sm:px-6 lg:px-8">
        <div class="max-w-6xl mx-auto">
            <div class="flex flex-col md:flex-row justify-between items-center">
                <div class="mb-6 md:mb-0">
                    <h3 class="text-xl font-bold text-white mb-2">技术小馆</h3>
                    <a href="http://www.yuque.com/jtostring" class="text-indigo-400 hover:text-indigo-300 transition-colors duration-300">http://www.yuque.com/jtostring</a>
                </div>
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                <p>© 2023 NoteGPT. 保留所有权利。</p>
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```